Rock crusher and disintegrator



March 23? 1943. M. E. MEINHARDT 2,314,414

Rocx cRusHER AND DIS'NTEGRATOR Filed sept. 15, 1941 Patented Mar. 23, 1943 Roon CRUSHER. AND DISINTEGRATOR Maude E. Meinhardt, Los Angeles, Calif., assigner to Hallie M. Melvin, Los Angeles, Calif.

Application September 15, 1941, Serial No. 410,837

3 Claims.

This invention relates to a rock Crusher and disintegrator, and though more particularly intended for this purpose mayV also be used to advantage to crush and grind various other hard substances.

It is an important object of the invention to improve upon the contour and mounting means for that portion of the crushing jaws which are subjected to the greatest pressure and strain.

Another object of the invention is to provide a more compact and simple arrangement of means for actuating the crushing or grinding jaws, whereby' adequate leverage is afforded and at the same time sufli'cient strength of the operating means is provided to safeguard against breaking when the machine is subjected to severe strain.

Another object is to provide improved. means for removably supporting the crushing jaws or protecting linings for them so that worn out parts may be easily removed and replaced, and yet will be securely held in their operative positions.

A more specific object of the invention is to provide an opstanding pulverizi'ng jaw structure so constructed as to combine a hopper structure with a jaw structure in an improved manner. v

Yet other objects relate to general simplication and more sturdy construction of the machine of the class to which the invention pertains. Y Y

The invention also includes the provisionof a machine capable of performing a two-step crushing process, whereby materials fed to the machiner to be pulverized are first reduced to a` predetermined degree of iineness, the machine thereupon furtherfcrushing the material until it is reduced to a powder of the desired degree of neness, or mesh.

Y Still other objects, advantages and features of invention may hereinafter appear.

Referring to the accompanying drawing, which illustrates what is at present deemed to bela preferred embodiment of the invention,

Fig. 1 is a View of the crusher as seen partly in side elevation and partly in vertical section, the sectioned portion of the View being'on line I--l of Fig. 2. In this view limits of jaw movement are indicated by broken lines.

Fig. 2 is a view showing the Crusher partly in plan and partly in transverse section, the sec- .tioned portion of the View being online 2-2 of Fig. 1.

Fig. 3 is a sectional detail taken on line 3--3 Of Fig. 1.

Fig. 4V is' a fragmental elevation of a foot portion of the casing.

Fig'. 5 is a fragmental vertical section on' a reduced scale, illustrating a modicati'on.

Referring in detail to the drawing, a box or casing structureY I is shown having an open top. The side wallsA H of this casing cooperate with a stationary jaw l2 and a movable jaw I3 to afford a downwardly directed feed passage or hopper structure into which is fed the material being disintegrated. Near its upper end said stationary, though* adjustable, jaw I2 has a backward extension l5 having through it an aperture or horizontall bore I6 through which passes a bar or sturdy piny il, the casing sidewalls Il having upper corner portions which support the end portions of said bar. A spacer sleeve I8 surrounds the portion of the bar I'l which bridges the space between the casing Walls Il.

The -jaw' l2l is adjustable by means of a pair of follower bolts |9` to vary its inclination and also tovary the distance of upper and lower working faces with whichv it is provided, from the movable jaw I3; Said `follower bolts extend through screw-threaded bores provided for them in lugs 29ay located in corners formed at the Y juncture of casing foot members with the casing side walls Il. The inner ends of said bolts abut against the sockets or seats 2| formed for them in the outer sideV of a horizontal follower bar 22I which,v as seen in cross section, is shaped as a truncated wedge, the narrow side of which is directed upwardly.

HThat side Yof the foot portion of the movable jaw i3 which is opposite to the follower bar 22 engages an antifriction roller .'23 carried by bearingsy 2li` one of which is located at each side of the roller which extends from side to side of the machine. v

The movable jaw i3 is supported in a pendant manner by means of a rocking shaft 25 which passes through its enlarged upper end portion 25, said shaft 25r having beyond rthe sidesV of the jaw projecting vendY portions each of which is supported by the short arm 21 of a lever fulcrummed on a crossv bar 28, said lever having a longer, downwardly'extending operating arm 2t'. At each side ofthe Crusher the lever arm 2S has its lower end pivotally connected to a link 3l driven by a crank pin 32 carried eccentrically by a shaft 33, toA which is lxed the combined ywheel and pulley 34, driven by a belt 35'. It will beY observed from Fig. 3 thatA a` Y simplified crank structure results from the fact that the shaft 33 is made of a suiciently large diameter to secure the desired eccentricity for each crank pin 32 when the latter is formed as an integral extension confined within the periphery of that end of the shaft which carries such crank pin. Further advantages of this crank structure are greater ease of assembling and disassembling. The side walls II of the machine are provided with substantial bearings 36 for said shaft 33. The combined fiy wheel and pulley 34 has annular end bosses or hub portions 34h which have a working contact with the side walls of the casing.

The grinding face 40 at the lower portion of the movable jaw is convex and is formed upon a shoe 4| which runs from one side to the other of said jaw. Said shoe is beveled along its upper and lower edges in such a manner as to make its back face narrower than its pulverizing face, and is fitted into the lower end portion of a long, vertically extending recess in the jaw I3, the lower end of said recess being bounded by the downwardly inclined shoulder ft2, while the upper end of said recess is undercut to form the shoulder 43. In said elongated recess is first inserted the jaw facing member 54, so that when the shoe 4| is put into place as shown it serves to lock said facing member in place. The shoe 4| is attached by means of a bolt 45 near each end, these bolts having angular heads in correspondingly shaped recesses in the shoe so that they cannot turn. Onto opposite ends of said bolts are screwed nuts 41 located in recesses so as not to be engaged by the antifriction roller 23. In addition to the securing means for the facing plate 44 afforded by the attached shoe 4I a pair of securing bolts 139 are provided for the lower portion of the facing plate 44, these bolts having flared heads located in sockets provided for them in the plate and having nuts 60 screwing onto their opposite ends.

The stationary jaw I2 has its foot portion provided with a pulverizing face 65 which is formed upon a shoe 66 of greater width than the shoe 4| already described. Said shoe has a pair of securing bolts 61 in its lower end portion, these bolts being like the bolts 59 already described, their nuts 68 being located in recesses provided for them in the back of the jaw I2. The upper edge portionV of the shoe 66 has securing bolts 1|) which are like the bolts 61 except that they are shorter, and are likewise provided with nuts 1I.

Above the shoe 66 the jaw I2 is provided with a face plate 13 which is beveled at its lower end at 14 where it meets a reversely beveled surface along the upper edge of the shoe 66 which serves to lock the lower portion of said plate in place. The upper portion of said plate 13 is beveled and underlies a reversely beveled, undercut shoulder 11 in the upper portion of the jaw thus completing the means for holding said plate in its attached position. Said face plate 13 is provided with a series of feed teeth '13a which cooperate with a series of feed teeth 4a provided in the face plate 44 of the jaw I3. Both these series of teeth have their largest teeth in the mid-length of the series, the size of the teeth diminishing upwardly and downwardly in each case. The shoe 66 may be regarded as a downward extension of theV 1ining 13.

The facing plate 13, conjunction with the Y toothed portion 91.

shoe 14 therebelow provides a feeding recess 13 which is bounded above by an angular shoulder 19, and this recess cooperates with an opposed recess 44T in the lower part of the facing plate 44 of the movable jaw I3. Superjacent to these recesses the facing plates 44 and 'I3 are respectively provided with short smooth face portions 44j and 14f, these smooth face portions dening an isthmus through which the material is fed from the upper hopper cavity |071 into the lower hopper cavity IIh, the latter hopper cavity being formed as a result of the oppositely disposed recesses just mentioned.

The curvature of that part of the movable jaw which is engaged by the roller 23 is approximately the same in degree as that of the adjacent, parallel grinding face of the same jaw, and this insures that, during operation, a uniform clearance is maintained between the 0pposed grinding faces adjacent to said roller. As a result, no ore can be discharged from between the two jaws until it has been ground to a predetermined degree of neness.

It is to be understood that, although only a single pair of jaws have been shown and described, yet a plurality of pairs of such jaws may be embodied in a single machine without exceeding the scope of the claimed invention.

The general compound movement of the movable jaw I3 is indicated by double headed arrows.

In order further to stabilize the attached linings 44 and 13 they are respectively furnished with rectangular backward projections 441: and 13:1: which are seated in correspondingly shaped jaw recesses provided for them.

The toothed portions of the lining members 44 and 13 crush the materia1 fed to the machine and the grinding or pulverizing is performed lower down between the shoes 4| and 66.

In order to protect the inner faces of the side walls II of the casing from injurious wear, a wear plate is fitted into a suitable recess provided for it in the inner face of each side Wall of the casing.

The left hand portion of the casing as viewed in Fig. 1 is provided with clamping bars 85 surrounded by spacing sleeves 86 and having nuts 88 on their ends, while in the opposite end portion of the casing there are also clamping bars surrounded by sleeves 86 and furnished with nuts 88.

In Fig. 5 is shown a modified form of lining and shoe structure for the jaws, the stationary jaw I2 carrying a shoe 90 having a face 9| slightly concave throughout its lower portion and the lining member 92 having a straight flat outer face that is in alinement with said face 9|. The movable .jaw I3 has a shoe 95 similar to the shoe 40 of Fig. 1, but' its lining member 9S has no hopper recess, but has a slightly convex Otherwise this view has reference numerals like those of Fig. l.

In both embodiments of the invention the casing has a delivery opening 98 between foot portions 20 and 99.

I claim:

l. In a crusher, a casing, a stationary jaw mounted* thereon having a lower end portionfurnished with a grinding face, a pendant movable jaw carrying in its lower portion a grinding face which is convex in its vertical extent, an antifriction roller engaging the side of said pendant jaw opposite to its said face to maintain it in a close working relation to the grinding face of said stationary jaw, said casing having opposite side walls between and by which said roller is horizontally supported, a horizontal fulcrum shaft supported by the casing, a lever carried by each end portion of said shaft, said levers each having an upper and a lower limb in relation to said shaft, the upper ends of said" levers being inclined toward the top of said stationary jaw, a rocker shaft extending through the upper parts of said inclined limbs and through the upper part of said movable jaw thereby Jpendantly supporting said jaw between and below said inclined limbs, and means oper" atively connected with the lower ends of said levers to. oscillate them in unison.

2. The subject matter of claim 1 and, said stationary jaw having a transversely extending recess snperjacent to its grinding face and a feed shoulder along the upper side of said recess, said shoulder maintaining a closely adjacent relation to the grinding face of the moving jaw during the operation of themachine.

3. In a Crusher, a casing, a crushing and grinding jaw mounted thereon, a driving shaft mounted on said casing, said shafthhaving a crank pin projecting eccentrically from and formed as an integral extension of aniend portion thereof, said crank pin being locatedwithn the circumference of the end portionjjof the shaft from which it projects, a link having one end portion operatively related to said crank pin, means operatively related to the opposite end portion of said link to operate said jaw, and means to rotate said shaft, said casing having side Walls, and said means for rotating said shaft including a combined fly wheel and pulley xed thereto between said casing walls, said wheel having hubs in a working t relative to the inner faces 

